The influence of downstream changes in water quality on phytoplankton composition in the Vaal River, South Africa

$53.20 plus tax (Refund Policy)

Buy Article:


Links between spatial differences in phytoplankton composition and changes in environmental variables in the Vaal River, South Africa, were investigated. Multivariate analysis showed that the most important environmental variables influencing algal abundance were turbidity, conductivity, nutrient concentrations and temperature. Of these variables conductivity, phosphorus, nitrogen and SiO2-Si showed spatial differences in concentration. The average nutrient concentrations (phosphorus, nitrogen and SiO2-Si) showed downstream decreases, while the average conductivity increased in a downstream direction. Spatial changes in phytoplankton composition could also be illustrated and were especially apparent when the contribution of Cyanobacteria (blue-green bacteria or blue-green algae), Bacillariophyceae and Euglenophyceae to the total algal composition was taken into account.


Document Type: Research Article

Publication date: January 1, 2005

More about this publication?
  • Co-Published by NISC and Taylor & Francis - Subscriber access available here
Related content

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more